Diatomaceous ntiaj teb yog ib hom ntawm biogenic siliceous sedimentary pob zeb, feem ntau yog tsim los ntawm ancient diatom seem.Nws cov tshuaj muaj pes tsawg leeg feem ntau yog SiO2, muaj me me ntawm Al₂O₃, Fe₂O₃, CaO, MgO, K₂Aw, Na₂O, P₂O₅thiab organic teeb meem.Kev siv lub ntsiab ntawm diatomite yog lim pab, muab tub lim, adsorbents, catalytic carriers, ib puag ncig tus phooj ywg cov ntaub ntawv hauv tsev thiab lwm yam.